I want to create user Registration with their email address

Question

I want to create a user REgistration page with email address ( user their gmail address) and want to client side checking that this gmail address exists or not ?? I want to use email Address field using (gmail account) and want to check client side if this gmail already valid and verified or not

Danish Habib · Answer

this is the solution to check that your email exists on gmail or not TcpClient tClient = new TcpClient("gmail-smtp-in.l.google.com", 25); string CRLF = "
"; byte[] dataBuffer; string ResponseString; NetworkStream netStream = tClient.GetStream(); StreamReader reader = new StreamReader(netStream); ResponseString = reader.ReadLine(); /* Perform HELO to SMTP Server and get Response */ dataBuffer = BytesFromString("HELO KirtanHere" + CRLF); netStream.Write(dataBuffer, 0, dataBuffer.Length); ResponseString = reader.ReadLine(); dataBuffer = BytesFromString("MAIL FROM: " + CRLF); netStream.Write(dataBuffer, 0, dataBuffer.Length); ResponseString = reader.ReadLine(); /* Read Response of the RCPT TO Message to know from google if it exist or not */ dataBuffer = BytesFromString("RCPT TO: " + CRLF); netStream.Write(dataBuffer, 0, dataBuffer.Length); ResponseString = reader.ReadLine(); if (GetResponseCode(ResponseString) == 550) { Response.Write("Mai Address Does not Exist ! "); Response.Write(" Original Error from Smtp Server : " + ResponseString); return false; }

Danish Habib · Answer

Nilesh Jadav , Thanks for contineous reponses and prompt responses The second example shared by you is still using the same techniques in this case it is in the user hand to use a@gmail.com, or b@gmail.com , I want when the user input a@gmail.com the system should check that a@gmail.com is actually existing in gmail server or not using SMTP or POP3

Nilesh Jadav · Answer

Hey Danish ! Ok here is the link, I think this will work ! http://www.aspdotnet-pools.com/2014/12/validation-of-duplicate-email-id-of.html

Danish Habib · Answer

Hi Nilesh Jadav Thanks for prompt Response My Question is not like that Listen Now I have a User Registration Form Through which user have to sign up the Fiels are (userid,Name,Email,Password) I want to prevent the user from input email other than their gmail Already existed account like Dansih.habib@gmail.com if this does not exists in real then the the system should send them a message , my question is integrating gmail email address as your email is User Registration Form

Nilesh Jadav · Answer

Hey there ! Check these link : http://www.aspsnippets.com/Articles/Simple-User-Registration-Form-Example-in-ASPNet.aspx http://www.webcodeexpert.com/2013/08/create-registration-form-and-send.html http://www.webreference.com/programming/asp_net/registration-confirmation-system/index.html